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Description
Sundown Audio - SA-Series v.3 12"1500 Watts RMS 3000 Watts Peak Dual 2 or 4 ohm voice coils Vented magnetic gap & solid pole piece with vent channels Aluminum 2. 75 voice coil former for superior heat dissipation Innovative high velocity, cast aluminum vented frame spacer ring Magnet ID faraday ring & pole cap faraday ring for smooth acoustic response High temperature copper voice coil wire Spring loaded terminals Stitched on double XL tinsel leads This SA 10 12 v. 3 series is the
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1500 Watts RMS / 3000 Watts Peak
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Dual 2 or 4 ohm voice coils
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Vented magnetic gap & solid pole piece with vent channels
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Aluminum 2.75” voice coil former for superior heat dissipation
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Innovative high velocity, cast aluminum vented frame spacer ring
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Magnet ID faraday ring & pole cap faraday ring for smooth acoustic response
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High-temperature copper voice coil wire
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Spring-loaded terminals
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Stitched-on double “XL” tinsel leads
This SA-10/12 v.3 series is the next generation upgrade to the v.2 series. We stuck with the 2.75” coil diameter and added another 5mm of length for additional linear x-max (22mm now). We are able to perfectly balance the mass, motor force, and suspension stiffness for the intended power level. Compared to the v.2 the v.3 features taller cones and wider spiders to enhanced linearity and coil stability to the next level. We also utilized full 3D FEA to further optimize the spider packs for this generation.
The motor also features a large magnet shorting ring (faraday ring) & pole cap faraday ring to reduce distortion and deliver smoother response across the entire acoustic spectrum. With the v.3 upgrade we integrated a completely "locked-in" faraday ring that is physically held in place by the T-Yoke. The motor & coil setup is mated to an extremely robust multi-layer spider with fully tied-on & doubled-up “XL” tinsel leads. A competition-grade paper cone, strong foam surround, and custom-tooled aluminum frame (same frame as the bigger brother U v.2 series) are used to complete this masterpiece. On top of the ~22mm of one-way linear excursion we have an x-mech limit of 41mm one-way before coil bottom making it nearly "bottomless." The new motor was designed as a "little brother" to the U v.2 series so you will also note the updated venting system with a solid pole piece from the back and channeled pole on the inside.
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RMS Power (D2)
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Peak Power (D2)
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Re-Ohms (D2)
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Vas-L (D2)
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Qes (D2)
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Qms (D2)
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Qts (D2)
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Le-mH (D2)
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BL-NA (D2)
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Mms-Grams (D2)
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Cms-uM/N (D2)
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Sensitivity-dB @ 1w/1m (D2)
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Xmax (D2)
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Peak Power (D4)
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Re-Ohms (D4)
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FS-Hz (D4)
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VAS-L (D4)
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Qes (D4)
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Qms (D4)
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Qts (D4)
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Le-mH (D4)
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BL-NA (D4)
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Mms-Grams (D4)
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Cms-uM/N (D4)
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Sensitivity-dB @ 1w/1m (D4)
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Xmax (D4)
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Documentation
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Displacement (Inches)
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Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
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Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.7 ★★★★★
Based on 17 reviews
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Product Reviews
★★★★★ 5
Super soft and comfortable!
I haven't bought new underwear in forever. I used to wear thongs, but now find them incredibly uncomfortable. The last few times I've tried to buy new underwear, the sizing was either way off (I'm a medium, but gave up after having to return them for a large and then extra large) or the quality was horrible (two brands stretch waaaay out and they can fall down while wearing them (I have larger ass-ets, so they shouldn't start to slide down during use). I tried these after buying some bamboo pyjamas and I love them! They are incredibly soft, comfortable, and stretchy. I can use them all day, and they work well, whether I'm lounging on the couch or wearing them under my spandex shorts at the gym, they don't ride up or slide down. They are both comfortable and look sexy, while providing support in all the right places. I haven't had them too long, so I can't speak on the durability, but they appear to be of good quality and I plan to order more, this time without the band.
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Reviewed in the United States on November 13, 2025
★★★★★ 5
Well made, light fabric. Waist doesn't roll.
These bamboo underwear really do keep you cool.
They fit true to size, and wear easily. the wide elastic waist band doesn't roll on me.
They are comfortable to wear, washed and dried easily.
The material has some stretch to it, but not a lot.
Well made, no stray strings. Perfect fit for me.
Just what I was looking for.
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Reviewed in the United States on May 17, 2026
★★★★★ 5
Good quality, smooth feel
I got these briefs so recently that have washed just one pair so far. First off, these are very comfortable, the material is soft & bordering silky, good quality sewing. Wash well and minimal if any shrinkage. They do come a bit wrinkled from the dryer but hey, these are underwear and will go on smoothly. If it were a t-shirt, I would look sloppy. I feel the sizing is accurate. No rolling and these don't announce themselves under clothing. Planning on getting more of these boxers and replacing my old panties.
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Reviewed in the United States on January 31, 2026
★★★★★ 4
A little snug on the thighs
Size: Medium, Color: Multicoloured G (5-pack)
Super comfy, soft and thin. For reference, I'm 5'6", 135, athletic build. I bought medium. I almost returned them because I thought they were a bit too snug on my thighs, and my thighs are not large at all. I was concerned about panty lines under snug clothing. But, because they're thin, I figured they would probably stretch, so I kept them. So far, I've only worn them under a night shirt, but they're super comfortable and they dont ride up at all. Very nice, but if your thighs are a little thick, you probably won't like them.
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Reviewed in the United States on August 29, 2025
★★★★★ 5
Functional + Sexy
Size: Small, Color: Multicoloured E-(5-pack), Size: Small, Color: Multicoloured E-(5-pack)
Not only do these feel good, my husband can’t keep his hands off me. They fit so good and are soft. I change into these to sleep but also just use them as shorts to wear around the house. They’re comfortable and don’t slide around. I got a size small and I’m 100lbs.
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Reviewed in the United States on April 13, 2026